@Chris01,
I don't really know anything about future firmware developments such as this. However, I do know that the Engineering team has been working to add some much-requested features to products gradually. Unfortunately, this starts with the newest product lines as they are either built with the feature in mind or are simply more capable of adding features to it.
In almost all cases, the Deco network's features will be decided by the features of the main deco unit, you may be able to gain access to some additional features that are being added to the newest Decos by replacing your main node.